Chery Tiggo. Manual — part 108
2.
INSPECTION START
• Start the engine.
Is any cylinder ignited?
Yes
>>
If with the X-431, go to the next step.
If without the X-431, go to step 5.
No
>>
Go to step 6.
3.
PERFORM ACTIVE TEST FUNCTION
• Select ⬙ACTIVE TEST⬙ menu.
• Perform injector active test.
• Make sure that each test produces a momentary engine speed drop.
Is the check result normal?
Yes
>>
Go to step 11.
No
>>
Go to step 6.
4.
CHECK FUNCTION OF INJECTOR
• Listen to injector operating sound one by one.
Do all injectors clicking noise exist?
Yes
>>
Go to step 11.
No
>>
Go to the next step.
5.
CHECK INJECTOR ELECTRICAL CONNECTOR
• Turn ignition switch off.
• Disconnect the injector electrical connector (1).
• Inspect the electrical connector for damage.
Is the electrical connector OK?
Yes
>>
Go to the next step.
No
>>
Repair or replace the electrical connector
as necessary.
DIAGNOSIS & TESTING
BESM040006
03
6.
CHECK INJECTOR POWER SUPPLY CIRCUIT FOR OPEN
• Turn ignition switch on.
• Check injector supply voltage between sensor ter-
minal and ground in the electrical connector.
• Battery voltage should exist.
Is the check result normal?
Yes
>>
Go to step 8.
No
>>
Go to the next step.
7.
DETECT MALFUNCTIONING PART
• Check the following:
− Front fuse and relay box F3, A13, G5
− Fuse 12, fuse 24, fuse 27
Without EOBD (1.6L)
− Front fuse and relay box F3, G2, G5
− Fuse 12, fuse 23, fuse 24
− harness between injector and fuse
Is the check result normal?
Yes
>>
With the X-431, check the system, If OK, go to the next step.
No
>>
Repair or replace malfunctioning parts.
8.
CHECK INJECTOR CONTROL CIRCUITS FOR AN OPEN
• Check injector control circuit voltage.
• 3.6 V should exist.
Is the check result normal?
Yes
>>
Go to step 10.
No
>>
Go to the next step.
DIAGNOSIS & TESTING
LTSMD030024
9.
DETECT MALFUNCTIONING PART
• Turn ignition switch off.
• Disconnect ECM harness connector.
• Check harness continuity between following terminals.
INJECTOR NO.
ECM
TERMINAL
INJECTOR
TERMINAL
1
27
2
2
6
2
3
7
2
4
47
2
• Continuity should exist.
Is the check result normal?
Yes
>>
Go to the next step.
No
>>
Repair circuit for an open in harness or connectors.
10.
CHECK INJECTOR RESISTANCE
• Check fuel injector resistance between the following terminals.
INJECTOR
NO.
INJECTOR
TERMINAL
RESISTANCE
(APPROXIMATELY)
⍀ (20°C)
1
1 & 2
12
2
1 & 2
3
1 & 2
4
1 & 2
• Check sensor signal output.
• Connect ECM connector.
• Connect injector connector.
• Check fuel injector voltage between the following terminals and ground.
TERMINAL NO.
ITEM
CONDITION
DATA (AVERAGE DC
VOLTAGE)
6
Injector
• Engine is running
• Warm-up condition
• Idle
• Accelerate suddenly
Voltage: 11 - 14 V
7
27
47
DIAGNOSIS & TESTING
03
Is the check result normal?
Yes
>>
Go to the next step.
No
>>
Replace injector.
11.
CHECK DTC
• With the X-431 scan tool, read ECM DTCs.
• See ⬙DTC Confirmation Procedure⬙.
Is DTC P0201, P0202, P0203 or P0204 still present?
Yes
>>
Replace the ECM.
NOTE : The Immobilizer control module must be matched to the new ECM (See ECM Removal & Instal-
lation in Section 03 Electronic Engine Controls).
No
>>
The system is now operating properly.
Reassemble the vehicle and road test to verify the customers complaint is repaired.
DIAGNOSIS & TESTING
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